Chair structure



FIG. 1 is a perspective view of the chair structure showing my design.

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a side view thereof;

FIG. 7 is an opposite side view thereof; and,

FIG. 8 is a perspective view of the chair structure having a slightly wider top.

The features presented in broken lines are for environmental purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a chair structure, as shown and described. 